Chlorine Bleach is what they use in swimming pools. I never heard that pool water will kill a plant. One teaspoon to a quart is not lethal, and is nothing compared to the percentage of what is used in a swimming pool.
And as far as hydrogen peroxide is concerned, I saw a greenhouse grower pour directly from the bottle into the center of a phal, hoping to kill off a disease. Hydrogen peroxide is oxogen, after all.